Merge staging-next into staging

pkgs/development/haskell-modules/configuration-ghc-8.8.x.nix

@@ -102,11 +102,6 @@ self: super: {
   vault = dontHaddock super.vault;
   monad-par = dontCheck super.monad-par;   # test suite does not compile in monad-par-0.3.4.8
 
-  # TODO dont fetch patch if https://github.com/simonmar/alex/issues/140 is resolved
-  alex = appendPatch super.alex (pkgs.fetchpatch {
-    url = "https://github.com/simonmar/alex/commit/deaae6eddef5186bfd0e42e2c3ced39e26afa4d6.patch";
-    sha256 = "1v40gmnw4lqyk271wngdwz8whpfdhmza58srbkka8icwwwrck3l5";
-  });
   # https://github.com/snapframework/snap-core/issues/288
   snap-core = overrideCabal super.snap-core (drv: { prePatch = "substituteInPlace src/Snap/Internal/Core.hs --replace 'fail   = Fail.fail' ''"; });
   # needs a release

pkgs/development/haskell-modules/make-package-set.nix

@@ -181,7 +181,10 @@ in package-set { inherit pkgs stdenv callPackage; } self // {
     #    '... foo = self.callHackage "foo" "1.5.3" {}; ...'
     callHackage = name: version: callPackageKeepDeriver (self.hackage2nix name version);
 
-    # callHackageDirect :: Text -> Text -> AttrSet -> HaskellPackage
+    # callHackageDirect
+    #   :: { pkg :: Text, ver :: Text, sha256 :: Text }
+    #   -> AttrSet
+    #   -> HaskellPackage
     #
     # This function does not depend on all-cabal-hashes and therefore will work
     # for any version that has been released on hackage as opposed to only